Posted by greygoat on March 13, 2009 at 07:25:10 from (98.125.72.254):
In Reply to: Wood splitter valve posted by JayinNY on March 12, 2009 at 12:50:36:
On most brands of auto return valves, when put in the return position, a couple of spring loaded B B size ball bearings slide into a notch at the back end of the valve spool. When the cylinder completes the return stroke, and can't move any farther, hydraulic pressure forces the balls out of the notch, and the centering spring returns the valve to the neutral position. When this type of valve fails to lock in the return position it's usually because the balls have worn a groove where they ride into the locking notch. Some, better quality valves have a replacable insert on the rear of the valve. On others, built to sell for a price, rather than to a standard of quality, (cheap valves) you may have to replace the valve if you want to keep the auto return function. A GOOD professional hydraulic shop will have parts breakdown literature, or can tell you if parts are available. Splitters sold by chains such as Home Depot, or Tractor Supply Stores usually won't have the quality valves.
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